Lion's out and there's a lot of new stuff to explore. Apple tells you about most of it on …
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1. Reveal the Dock while using a fullscreen app

Lion's fullscreen apps sure are pretty, but they can slow you down by hiding many navigation elements of the operating system. If you want to reveal the dock while in full screen mode to quickly switch to a new program, TUAW reveals that you can simply rest on the bottom of the screen (or left or right side, if that's where you keep the Dock), then push it down as if you're trying to move beyond the edge of the monitor. It's not a natural movement, but the dock does come out of hiding as advertised.

2. Put your contact info on the lock screen

Though it was possible to do this in Snow Leopard with third party apps, Lion now allows you to place a personal message with your contact information on the lock screen for any good samaritan that should stumble upon your lost laptop. To enable the feature, just go to your "Security & Privacy" preference pane, check the box labeled "Show a message when the screen is locked," and fill in your information.

3. Move applications out of your Applications folder

Lion removed the ability to drag application files into a different folder, and instead only creates an alias for the program in the new folder while keeping the actual app package in the Applications folder. Luckily, Tested points out that you can still easily move applications to your heart's content by holding down the Command key as you drag.

4. Use Quick Look in Stacks

Ever since the release OS X Leopard, Stacks and Quick Look have been great tools for quickly accessing and checking files without opening a new window. Unfortunately, OS X bafflingly omitted the ability to use Quick Look from within a Stack, forcing you to open a new finder window. No more. Just mouse over your file in any stack and hit the spacebar as you normally would to get a quick preview of its contents.

5. Use the spacebar to zoom in on Mission Control thumbnails

If you keep a lot of windows open, it can be tough to see exactly what each one contains in Mission Control, especially on a tiny MacBook Air screen. Thankfully, Tested reveals that you can quickly zoom in on any window without exiting Mission Control by mousing over it and tapping the spacebar. Hit space again to shrink it back down.

These secrets will only get you started with unraveling Lion, so check out the rest of Lifehacker's coverage: